The whole PNW was blanketed with smoke all summer. Did it make a difference? If not, how could a geoengineering effort move the needle unless it were equally big, and how could we possibly do something so big?
If so, what happens when we geoengineer something massive, then there are wildfires or volcano eruptions on top of that? We can't see the future, so we can't be sure our efforts will even be in the right direction.